Variable Interest Entities VIE Net Income or Loss and Tax Credits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CDE (NMTC)
Consolidated VIEs
VIE loss	$ (15)	$ (14)	$ (705)	$ (701)
Federal income tax credits	276	275	1,441	1,439
LIHTC
Consolidated VIEs
VIE loss	(177)	(270)	(680)	(811)
Federal income tax credits	$ 294	$ 318	$ 881	$ 953